RESEARCH TO IMPROVE THE EFFICIENCY OF ANTIMONY TREATMENT IN FIBER WASTEWATER

Abstract

In this study, antimony (Sb) in textile wastewater was treated by using iron-based coagulants combined with MF membranes to replace the current floatation processing and improve the removal effectiveness of Sb. Influencing factors including type of coagulant, pH, dose of coagulant, Sb concentration have been investigated and the appropriate MF filter size was selected. The results showed that poly ferric sulfate (PFS) had the highest Sb removal efficiency among many iron-based coagulants. Suitable conditions are pH 6, dose of PFS at 50 mg/L and using a 0.2 µm MF filter, the removal efficiency of Sb reached 90%. The process mechanism has been described and the removal capacity of Sb fitted the Langmuir adsorption isotherm well. In summary, the results proved that flocculation by PFS combined with MF membranesis an effective and simple method to remove Sb in textile wastewater treatment process to match with wastewater receiving requirements of centralized wastewater treatment plants.